public class Demo02 {
    public static void main(String[] args) {
        /*
          数据类型:
          1.基本数据类型: byte、short、int、long
                       float、double
          2.字符: ''
          3.布尔: true false
        */

        byte b = 127;
        short s = 128;
        int i = 100;
        long l = 1000;

        float f = 3.14f;
        double d = 3.14;

        char c = '博'; //字符

        boolean bl = true;
    }
}
